Exam Practice Questions And Correct

Railway Signal Technician Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a railway signal?
• To entertain train drivers
• To control train speed
• To ensure safe train movements
• To indicate train weight

Rationale: Signals are installed to prevent collisions and ensure the

safe operation of trains.

• Which component detects the presence of a train on a track section?
• Semaphore
• Track circuit 1 / 4

• Relay
• Signal lamp

Rationale: Track circuits detect the presence of a train by completing

an electrical circuit through the wheels and rails.

• What does a red signal generally indicate?
• Proceed with caution
• Stop
• Reduce speed
• Track switching ahead

Rationale: Red signals universally indicate that a train must stop.

• Which type of signal provides information about speed restrictions?
• Stop signal
• Speed signal
• Distant signal
• Semaphore

Rationale: Speed signals inform drivers about the maximum speed

allowed on a track section.

• What is the function of a relay in railway signaling?
• Power the signal lamp
• Electrically control signal aspects and track circuits
• Switch tracks mechanically
• Measure train speed 2 / 4

Rationale: Relays are used to control circuits, signal aspects, and

interlocking safely.

• In railway signaling, what is interlocking?
• Mechanism to lift tracks
• System that prevents conflicting train movements
• Locking signal lamps
• Securing railway bridges

Rationale: Interlocking ensures that signals and points are

coordinated to avoid unsafe train movements.

• Which signal is used to warn a driver about a stop signal ahead?
• Stop signal
• Distant signal
• Speed signal
• Shunt signal

Rationale: Distant signals give advance warning of the next signal,

allowing the driver to take precautionary action.

• What is a semaphore signal?
• A digital control panel
• A mechanical arm that indicates signal aspects
• A type of relay
• A track switch

Rationale: Semaphore signals use a pivoted arm to visually indicate

“stop,” “caution,” or “clear.” 3 / 4

• Which color light on a signal indicates “proceed with caution”?
• Red
• Green
• Yellow
• White

Rationale: Yellow signals typically indicate caution or a reduced

speed requirement ahead.

• What does a signal’s “aspect” refer to?
• The angle of the signal pole
• Signal maintenance schedule
• The visual indication shown to the driver
• Type of lamp used

Rationale: Aspect refers to the appearance or indication (color or

position) displayed by the signal.

• Which device is used to control points (switches) remotely?
• Track circuit
• Point machine
• Semaphore
• Interlocking relay

Rationale: Point machines move track switches under electrical or

mechanical control.

• Which type of relay operates when a track circuit is clear?
• Ground relay
• / 4